TITLE:
Traffic Dynamics and Congested Phases Derived from an Extended Optimal-Velocity Model
AUTHORS:
Makoto Watanabe
KEYWORDS:
Optimal-Velocity Model, Phase Transition, Synchronized Flow, Jam Formation Mechanism, Fundamental Diagram
JOURNAL NAME:
Engineering,
Vol.6 No.8,
July
21,
2014
ABSTRACT:
Dynamics is studied
for one-dimensional single-lane traffic flow by means of an extended optimal-velocity
model with continuously varied bottleneck strength for nonlinear roads. Two phases
exist in this model such as free flow and wide moving jam states in the systems
having relatively small values of the bottleneck strength parameter. In
addition to the two phases, locally congested phaseappears as the strength becomes prominent. Jam formation occurs
with the similar mechanism to the boomerang effect as well as the pinch one
in it. Wide scattering of the flow-density relation in fundamental diagram is
found in the congested phase.